#640281
Closest named color: Indigo (#4B0082). oklch(37.6% 0.183 315.4), rgb(100, 2, 129).
Aa
White text reads best on this color (11.24:1).
About this color
#640281 is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.183 and its hue 315°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.057 away. White text reads best on it, at 11.24:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.183) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.86:1 |
| White text | 11.24:1 |
Values
| HEX | #640281 |
| RGB | rgb(100, 2, 129) |
| HSL | hsl(286, 97%, 26%) |
| OKLCH | oklch(37.6% 0.183 315.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #640281 | 11.24:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #640281 | 1.86:1 | Fails | Lc 9.9 | Not readable |
| #640281 text on white | 11.24:1 | AAA | Lc 94.0 | Preferred for body text |
| #640281 text on black | 1.86:1 | Fails | Lc -8.5 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#FAF2FE
oklch(97.1% 0.018 314.7)
-
Step 100
100
#F4E2FD
oklch(93.5% 0.041 314.6)
-
Step 200
200
#EDCAFC
oklch(88.4% 0.077 315.7)
-
Step 300
300
#E2A4FD
oklch(80.8% 0.138 315.2)
-
Step 400
400
#D36CFC
oklch(70.8% 0.22 315.3)
-
Step 500
500
#C62FF9
oklch(63.1% 0.281 315.3)
-
Step 600
600
#AC00DC
oklch(55.6% 0.273 315.3)
-
Step 700
700
#9100BA
oklch(49% 0.241 315.3)
-
Step 800
800
#78009A
oklch(42.7% 0.21 315.5)
-
Step 900
900 (this color)
#640281
oklch(37.6% 0.183 315.4)
-
Step 950
950
#3B0A4C
oklch(27.1% 0.116 315.3)
#640281 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #003684 | 0.158 |
| Deuteranopia (no green cones) | #003D7F | 0.161 |
| Tritanopia (no blue cones) | #612A4A | 0.116 |
| Achromatopsia (no color) | #3B3B3B | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640281
#640281
oklch(37.6% 0.183 315.4)
- #244D00
#244D00
oklch(37.5% 0.11 135.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #640281, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.057
- Purple #800080 ΔE 0.062
- Royal Purple #4B006E ΔE 0.063
- Rebecca Purple #663399 ΔE 0.077
- Rich Purple #720058 ΔE 0.080
- Chrysanthemum #560BAD ΔE 0.084
- Grape Purple #5D1451 ΔE 0.085
- Dark Magenta #8B008B ΔE 0.086
Use #640281 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.